Toshiba LF470/LF612 specifications Ordering Information, Piping Precautions, Meter size

TIC-LF470B

Wiring Precautions

(1)Connect the following two cables correctly:

1)signal cable (on the right facing the LF470)

2)excitation cable (on the left facing the LF470)

(2)Do not bend apply excessive force to these cables.

Piping Precautions

(1)Connect the fluid pipe to the pipe connection port using a joint that matches the Rc (PT) female screw. Use seal tapes when connecting the pipe to the port to prevent a fluid leakage. Do not tighten the connection screw too much.

(2)Design piping so that the detector’s pipe is always filled with the fluid to be measured, whether the fluid is flowing or not.

(3)The fluid to be measured must be held still in the pipe when the LF470 is being adjusted. If the fluid can not be stopped after the LF470 installation, install a bypass pipe in parallel with the LF470 flowmeter.

Meter size

To select the meter size:

See Table 3 to 4 and find meter sizes within the velocity of 0.3 to 32.8 ft/s (0.1 to 10m/s) for a specified full-scale (measuring range high limit) flow. Select one that has its full-scale velocity between 3.0 and 10 ft/s (1 and 3m/s).

Note: Make sure the full-scale flow rate used for the final planning stage stays within 32.8 ft/s (10m/s) in terms of flow velocity.

Table 2. Meter size and Flow Velocity (SI unit)

Unit:gal/min

Meter size	0.98 ft/s	3 ft/s	10 ft/s	32.8 ft/s
(inch)
1/10”	0.02334	0.07115	0.2372	0.7781
1/6”	0.05975	0.1821	0.6071	1.992
1/4”	0.1344	0.4098	1.3660	4.482

Table 3. Meter size and Flow Velocity(US unit)

				Unit:L/min
Meter size	0.3m/s	1m/s	3m/s	10m/s
(mm)
2.5	0.08835	0.2945	0.884	2.945
4	0.2262	0.7540	2.262	7.540
6	0.5088	1.6967	5.090	16.967

About establishment environment

Do not store or install the flowmeter:

•Where there is direct sunlight.

•Where excessive vibration or mechanical shock occurs.

•Where high temperature or high humidity conditions exist.

•Where corrosive atmospheres exist.

•Places that can be submerged under water.

•Where there is a sloped floor. To put the flowmeter temporarily on the floor, place it carefully with something, such as a block, to support it so that the flowmeter will not topple over.

In areas like the following, there may be the case that infrared switches do not function correctly. (If these are unavoidable, use an appropriate cover.)

(1)Where unit (operation panel) is exposed to direct sunlight, reflection of light onto window pane and diffused light reflection.

(2)Where smoke and steam may occur.

(3)Where exposed to direct snow, ice or mud.

Ordering Information

1.When ordering the LF470 flowmeters, refer to Tables 4 to 5 (Specification Code).

An entry must be made for each of the columns in each of these tables.

2.Fluid characteristics:

(1)Type of fluid to be measured and its characteristics

(2)Fluid temperature

(3)Fluid pressure

(4)Electrical conductivity of the fluid

3.Measuring range

4.I/O function setting

5.Ordering scope:

Flow calibration data: (required or not)

6.Other items

Specifications other than standard items

Consult a Toshiba representative before ordering when choosing materials of the wetted parts such as lining, electrodes, and grounding rings.

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